Add Package-Requires header for ELPA installations
Add Package-Requires header for ELPA installations

This commit adds a header which tells package.el that
go-autocomplete depends on auto-complete.
thousandhigh/gocode,TheBB/gocode,mdempsky/gocode,kerr-huang/Gocode,beni55/gocode,kerr-huang/Gocode,kerr-huang/Gocode,artnez/gocode,mem/gocode,suncycheng/gocode,MerlinDMC/gocode,beni55/gocode,louiseGrandjonc/gocode,MerlinDMC/gocode,suncycheng/gocode,nsf/gocode,beni55/gocode,thousandhigh/gocode,louiseGrandjonc/gocode,nsf/gocode,toqueteos/LightTable-Go,TheBB/gocode,MerlinDMC/gocode,ghiden/gocode,nsf/gocode,syohex/gocode,fjl/gocode,fjl/gocode,louiseGrandjonc/gocode,fjl/gocode,mdempsky/gocode,artnez/gocode,lmh008/gocode,lmh008/gocode,mem/gocode,syohex/gocode,syohex/gocode,artnez/gocode,MerlinDMC/gocode,ghiden/gocode,lmh008/gocode,suncycheng/gocode,lmh008/gocode,thousandhigh/gocode,artnez/gocode,nsf/gocode,ghiden/gocode,beni55/gocode,TheBB/gocode,ghiden/gocode,thousandhigh/gocode,louiseGrandjonc/gocode,mem/gocode,mdempsky/gocode,toqueteos/LightTable-Go,fjl/gocode,kerr-huang/Gocode,mem/gocode,TheBB/gocode,syohex/gocode,suncycheng/gocode